Other degenerative diseases of the nervous system (G30-G32)

ICD-10 codes G30 through G32 cover a range of other degenerative diseases of the nervous system, primarily focusing on Alzheimer's disease and various types of neurodegenerative disorders affecting brain function and structure.

This range begins with G30 codes, specifying variations of Alzheimer's disease. For example, G30.0 denotes early onset Alzheimer's, also known as presenile dementia or primary degenerative dementia of the Alzheimer type with early symptoms like behavioral disturbances. In contrast, G30.1 refers to late onset Alzheimer’s disease, often presenting with depressive or paranoid features. Other codes such as G30.8 and G30.9 capture atypical or unspecified forms of Alzheimer’s. The next block, G31, addresses other degenerative nervous system diseases, including frontotemporal dementia (G31.0) and Pick’s disease (G31.01), alongside alcohol-related degeneration (G31.2) and rare hereditary conditions like Leigh’s disease (G31.82). Additionally, G31.83 identifies neurocognitive disorders with Lewy bodies, a form tied to Parkinsonism and dementia. Lastly, G32 codes capture degenerative nervous system disorders linked to other systemic diseases, such as vitamin B12 deficiency causing subacute combined spinal cord degeneration (G32.0) or cerebellar ataxia in systemic illness (G32.81). These codes are vital for medical coders and healthcare professionals to pinpoint specific neurodegenerative diagnoses, facilitating accurate documentation and targeted care.